Didymograptus sp
- Citations total:
- 1
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| details | Early Ordovician | USSR(Russian Platform) | German,T.N. Microfossils of Glauconite Layers (Data resulting from an investigation of a core from a borehole near Vologda). (In:Mikrofitofossilii Proterozoya i Rannego Paleozoya SSSR. B.V.Timofeev, editor) | 1974 |